Question

我创建了一个带派生类的基类。在winforms中，在相对添加类的属性之后，应将派生类的实例添加到列表框中，并将派生类的name属性作为列表框中的项名称。我收到一个OutOfMemory异常，说列表框已满。列表框中没有项目，因此我的代码以某种方式陷入了添加项目的循环中。以下是派生类的相关代码段：

//child class
public class Player : Character
{
    //new attributes
    string gender;
    bool dead;

    //constructor
    public Player(string charName, int charHitPoints, int charAC, int charAttack, int charDamage, string charAttackType, string Gender, bool Dead)
        : base(charName, charHitPoints, charAC, charAttack, charDamage, charAttackType)
    {
        gender = Gender;
        dead = Dead;
    }

    //accessible attributes
    public string PlayerGender { get; set; }
    public bool PlayerDead { get; set; }

    public override string ToString()
    {
        return Name;
    }
}

如您所见，我正在尝试使用Name属性作为列表框中的项目名称。也许我没有正确使用覆盖？这是用于将实例添加到列表框的相关代码段。这发生在winforms按钮的单击事件中：

 //create button
    private void button1_Click(object sender, EventArgs e)
    {
        //if creating a Player
        if (radioButton1.Checked & !radioButton2.Checked)
        {
            int value1;

            if (int.TryParse(textBox2.Text, out value1)
                && int.TryParse(textBox3.Text, out value1)
                && int.TryParse(textBox4.Text, out value1)
                && int.TryParse(textBox5.Text, out value1))
            {
                //create new object of Player class
                PlayerListBox1.Items.Add (new Player(textBox1.Text, Convert.ToInt32(textBox2.Text), Convert.ToInt32(textBox3.Text), Convert.ToInt32(textBox4.Text), Convert.ToInt32(textBox5.Text), textBox6.Text, textBox7.Text, false));

            }
            else
            {
                MessageBox.Show("Please enter only numbers for Hit Points, Armor Class, Attack, and Damage.", "Invalid Input");
            }
        }
    }

感谢您的帮助！

更新：这是基类：

 //parent class
public class Character
{
    //common attributes
    string name;
    int hitPoints;
    int armorClass;
    int attack;
    int damage;
    string attackType;

    //constructor
    public Character(string charName, int charHitPoints, int charAC, int charAttack, int charDamage, string charAttackType)
    {
        //constructor arguments
        name = charName;
        hitPoints = charHitPoints;
        armorClass = charAC;
        attack = charAttack;
        damage = charDamage;
        attackType = charAttackType;
    }

    //accessible attributes
    public string Name{get; set;}
    public int HitPoints { get; set; }
    public int ArmorClass { get; set; }
    public int Attack { get; set; }
    public int Damage { get; set; }
    public string AttackType { get; set; }
}

Answer 1

我想出了添加带有项目名称的对象作为对象属性的方法。它比我想象的要简单。首先，需要将相关属性（属性）声明为public。然后，使用以下代码设置列表框（与我自己的代码相关，如我的问题中所述）：

PlayerListBox1.DisplayMember = "Name";
EnemyListBox1.DisplayMember = "Name";

这会将每个相应列表框的DisplayMember设置为类对象（实例）的“Name”属性。在原始问题的代码中，“Name”属性通过charName构造函数被下推到派生类。因此，派生类仍然以迂回的方式利用公共“名称”属性。

使用name属性将对象添加到列表框

1 个答案: